compressor feed sizing

[Toros]

Hi,
I have to hook up a blow mold compressor in the existing manufactory;
Here is my engineering/calculation, Does this make sense???

Compressor name plate reading: @460v , 150 HP , RPM of 750 by "Petstar-550"
Per NEC:430-250, 150HP @ 460v has 180 FLA

therefore requires 300A , 3pole disconnecting means w/(3) 225A fuses (180 FLA x 125%=225A), and
This much power would be delivered through a feeder composing (3) 4/0 thhn, cu @ 75deg. , per NEC:310-15(B16).

Thank you for your feedback/input

 

[infinity]

Duplicate:

http://forums.mikeholt.com/showthread.php?t=158046